Soundcloud stream filtering done right

soundcloud-filter.user.js

// ==UserScript==
// @name         Soundcloud filter
// @namespace    https://gist.github.com/demaisj/9f8a4bbbe6828fb3c62643b67d75dfea
// @version      1.0.0
// @description  Soundcloud stream filtering done right
// @author       demaisj
// @match        https://soundcloud.com/*
// @grant        none
// ==/UserScript==

(function() {
    window.XMLHttpRequest_patches = window.XMLHttpRequest_patches || {};

    window.XMLHttpRequest_patches['https://api-v2.soundcloud.com/stream'] = function (xhr) {
        var data = xhr.responseJSON;
        for (var i = data.collection.length - 1; i >= 0; i--) {
            if (data.collection[i].type.endsWith('repost')) {
                data.collection.splice(i, 1);
            }
        }
        xhr.responseJSON = data;
    };

    if (!window.XMLHttpRequest.patched) {
        const old_XMLHttpRequest = window.XMLHttpRequest;
        window.XMLHttpRequest = class extends old_XMLHttpRequest {
            set onload (fcn) {
                super.onload = function (event) {
                    var url = this.responseURL.substr(0, this.responseURL.indexOf('?')),
                        count = 0;
                    for (var key in window.XMLHttpRequest_patches) {
                        if (window.XMLHttpRequest_patches.hasOwnProperty(key) && url == key) {
                            window.XMLHttpRequest_patches[key](this);
                            count += 1;
                        }
                    }
                    if (count > 0) {
                        console.log(`Applied ${count} ${count > 1 ? "patches" : "patch"} to ${url}`);
                    }
                    fcn.apply(this, event);
                };
            }
            get responseText () {
                if (this.patchedResponseText) {
                    return this.patchedResponseText;
                }
                return super.responseText;
            }
            set responseText (text) {
                this.patchedResponseText = text;
            }
            get responseJSON () {
                return JSON.parse(this.responseText);
            }
            set responseJSON (data) {
                this.responseText = JSON.stringify(data);
            }
        };
        window.XMLHttpRequest.patched = true;
    }
})();